* {
    margin: 0;
    padding: 0;
}

body {
    background-color: #fff;
    background-size: cover;
    background-repeat: repeat;
    float: right;
    margin-right: 200px;
}

.in {
    position: relative;
    left: 170px;
    top: 50px;
    margin-top: 40px;
}

.menu {
    width: 180px;
    height: 70px;
    font-family: '仿宋', serif;
    font-size: 20px;
    text-align: center;
    line-height: 70px;
    border-radius: 20px;
    font-weight: 900;
    background-color: #ace8ff;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease-in-out;
    opacity: .9;
}

.menu:hover {
    transform: scale(1.2);
    background: #99fadd;
}

.menu a {
    text-decoration: none;
    color: #f08b4c;
}

.menu-1 {
    width: 180px;
    height: 70px;
    margin-top: 60px;
    font-family: '仿宋', serif;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    line-height: 70px;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    background-color: #e3c6fd;
    transition: transform 0.3s ease-in-out;
    opacity: .9;
}

.menu-1:hover {
    transform: scale(1.2);
    background: #f6cfe8;
}

.menu-1 a {
    text-decoration: none;
    color: #38a4f1;
}

.menu-2 {
    width: 180px;
    height: 70px;
    margin-top: 60px;
    font-family: '仿宋', serif;
    font-weight: bold;
    font-size: 20px;
    text-align: center;
    line-height: 70px;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    background-color: #f9e19f;
    transition: transform 0.3s ease-in-out;
    opacity: .9;
}

.menu-2:hover {
    transform: scale(1.2);
    background: #fcb1d5;
}

.menu-2 a {
    text-decoration: none;
    color: #e58789;
}

.menu-3 {
    width: 180px;
    height: 70px;
    margin-top: 60px;
    font-family: '仿宋', serif;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    line-height: 70px;
    box-shadow: 2px 2px 8px rgba(0, 0, 0, 0.1);
    border-radius: 20px;
    background-color: #bbfefe;
    transition: transform 0.3s ease-in-out;
    opacity: .9;
}

.menu-3:hover {
    transform: scale(1.2);
    background: #f7fac7;
}

.menu-3 a {
    text-decoration: none;
    color: #cd96fa;
}

.nav {
    display: flex;
}

.container {
    position: relative;
    top: 70px;
}

.bubble {
    position: absolute;
    width: 270px;
    height: 270px;
    border-radius: 50%;
    box-shadow: inset 0 0 25px rgba (255, 255, 255, 0.25);
    animation: animate_4010 8s ease-in-out infinite;
}

.bubble:nth-child(2) {
    position: relative;
    zoom: 0.45;
    left: -10px;
    top: -100px;
    animation-delay: -4s;
}

.bubble:nth-child(3) {
    position: relative;
    zoom: 0.45;
    right: -80px;
    top: -300px;
    animation-delay: -6s;
}

.bubble:nth-child(4) {
    position: relative;
    zoom: 0.35;
    left: -120px;
    bottom: -200px;
    animation-delay: -3s;
}

.bubble:nth-child(5) {
    position: relative;
    zoom: 0.5;
    left: 0px;
    top: 200px;
    animation-delay: -5s;
}

@keyframes animate_4010 {

    0%,
    100% {
        transform: translateY(-20px);
    }

    50% {
        transform: translateY(20px);
    }
}

.bubble::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 45px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #fff;
    z-index: 10;
    filter: blur(2px);
}

.bubble::after {
    content: '';
    position: absolute;
    top: 70px;
    left: 80px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #fff;
    z-index: 10;
    filter: blur(2px);
}

.bubble span {
    position: absolute;
    border-radius: 50%;
}

.bubble span:nth-child(1) {
    inset: 10px;
    border-left: 15px solid #0fb4ff;
    filter: blur(8px);
}

.bubble span:nth-child(2) {
    inset: 10px;
    border-right: 15px solid #ff4484;
    filter: blur(8px);
}

.bubble span:nth-child(3) {
    inset: 10px;
    border-top: 15px solid #ffeb3b;
    filter: blur(8px);
}

.bubble span:nth-child(4) {
    inset: 30px;
    border-left: 15px solid #ff4484;
    filter: blur(12px);
}

.bubble span:nth-child(5) {
    inset: 10px;
    border-bottom: 10px solid #fff;
    filter: blur(8px);
    transform: rotate(330deg);
}